Just had Ultrasound scan??

Hi everyoneI didn't know wether to post or not as I usually just lurk! Quick intro so you know where I am in this horrible business of TTC - Been trying for almost 3 yrs now and apparently there is nothing wrong!? I have really bad crohn's disease which they think is holding us up - had operation to remove part of bowels last April and then concieved naturally in Aug only to miscarry end of Sep. Had 1st apt with Fertility specialist in Oct who said see how I go as we managed to conceive but need to have ultrasound scan to check things....5 months later finally got my scan!! (Was horrible as it's in the maternity dept and was surrounded by pregnant women - many saying how they were there for their first scan etc. I must have looked like a right miserable cow! I thought I'd explode if anyone asked me "how far along"!! Plus when letter came through it said for my dating scan and how I should take change with me to get photo's etc!!) Well all looks fine but this is the second scan I have had (had the other scan just before I got preg in Aug) and on both they said all looked fine - all clear but both also said thin lining?? Is this a problem?? I guess lining should be thin now as I'm day 7 of cycle but last time I was there just as I was about to Ov and it was thin then? Have got 2nd apt with Fertility people end of April. Sorry for such a long post! Guess I just felt the urge to chat to you all and stop lurking! x